I'm not sure if you are aware but Enermax just came out with their new PSU line. It's another 5% or so more efficient than the revolution lineup. The only problem I had with my revolution PSU was the fan. It had a little bearing noise but nothing terrible. My computer is so silent that it was just barely noticeable. Instead of RMAing it I just opened it up (voided the warrantly) and replaced the fan with a spare 140mm fan I had.

I guess that shows how much I trust Enermax though. I honestly had no worries about voiding the warranty because I trust that I wont need the warranty.